Printing mechanism with multiple hot melt nozzles
The multi-heat-nozzle printing mechanism solves the problem of material requirements for different parts of 3D printed parts by setting up multiple print heads and electric heating cylinder cooling plates, reducing costs, avoiding stringing, and improving printing quality.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
- Filing Date
- 2026-03-10
- Publication Date
- 2026-07-23
AI Technical Summary
In existing 3D printing technology, different parts of the printed part have different performance requirements but the same material, which leads to strict material selection and high cost. In addition, when switching print heads, stringing problems are easy to occur, which affects the print quality.
The multi-heat-nozzle printing mechanism is used, with multiple print heads that can be independently set with different printing materials. The melting and solidification of the printing materials are controlled by an electric heating cylinder and a semiconductor cooling chip. Combined with the elastic ring and rotating wheel of the feeding mechanism, stable delivery is ensured and stringing is avoided.
This allows for the use of different materials based on workpiece requirements, reducing material and subsequent processing costs, while also avoiding stringing issues during printhead switching and improving print quality.
Smart Images
Figure CN2026082478_23072026_PF_FP_ABST
Abstract
Description
A printing mechanism with multiple hot-melt nozzles TECHNICAL FIELD
[0001] The present application relates to the technical field of 3D printing, and particularly relates to a printing mechanism with multiple hot-melt nozzles. BACKGROUND
[0002] 3D printing (3DP) is also called additive manufacturing technology, which is a technology for manufacturing solid parts by layer-by-layer material accumulation according to three-dimensional CAD data.
[0003] The existing 3D printed parts are basically printed by using a single (composite) material. The materials of different parts of the printed part are consistent, that is, the performance is also consistent. However, after the printed part is installed in the working position, different parts of the printed part need different performance. Therefore, the selection of the printing material is relatively strict, and relatively many requirements are met, and the cost of the material is also not low. Or further processing is performed on the printed part, so that the required performance is obtained at the specific part, which also increases the production cost. SUMMARY
[0004] To solve the above problems, the present application discloses a printing mechanism with multiple hot-melt nozzles, which comprises a fixed seat, the lower end of the fixed seat is rotationally connected with a rotating seat, the lower end edge of the rotating seat is fixedly connected with a plurality of printing heads at equal angles, and the upper side of each printing head is provided with a feeding mechanism. Multiple printing heads are arranged, different printing materials can be independently arranged for each printing head, the demand for printing multiple materials for the same printed part is met, and the rotating seat is arranged to facilitate switching the printing heads.
[0005] The printing head comprises a cylinder, an electric heating cylinder is vertically arranged in the inside of the cylinder, a plurality of coils are wound around the side wall of the electric heating cylinder, a nozzle is fixedly connected to the lower end of the cylinder, an inlet hole is arranged at the upper end of the cylinder, and the inlet hole is located above the preset through hole of the nozzle. After the printing material enters the inside of the cylinder from the inlet, the coils are electrified to generate heat, and the printing material is melted and sent out from the nozzle.
[0006] An active column is arranged inside the electric heating cylinder, and a tapered hole with a smaller upper part and a larger lower part is arranged in the middle of the active column. The upper end of the active column is fixedly connected with a spring, and the upper end of the spring abuts against the upper part of the cylinder. A chamber is arranged on the upper side wall of the cylinder, and a semiconductor refrigeration sheet is arranged in the chamber. After the printing material passes through the upper end of the active column downward and starts to melt, if the print head needs to be switched, at this time, the coil at the active column is powered off, and at the same time, the semiconductor refrigeration sheet is powered on, and the refrigerating side faces the active column. At this time, the printing material inside the active column is solidified, and then the feeding mechanism acts to pull the printing material upward. At this time, the active column moves upward and generates negative pressure below. At this time, the material at the nozzle is sucked back into the inside of the cylinder, avoiding the problem of wire drawing at the current nozzle during the switching process of the printing material and affecting the printing quality.
[0007] The feeding mechanism includes a bottom plate, and two parallel rotating shafts are arranged on the bottom plate. Rotating wheels are arranged on the rotating shafts. Grooves are arranged on the side walls of the rotating wheels, and an elastic ring and a feeding wheel are buckled in the grooves from the inside to the outside. The back of the bottom plate is fixedly connected with a second motor, and the output end of the second motor is fixedly connected with one of the rotating shafts. When the feeding mechanism works, the printing material is clamped by the feeding wheel, and at the same time, the elastic ring is deformed by force, and its reaction force ensures the stability of the clamping. At the same time, due to the arrangement of the elastic ring, printing materials with various diameters can be conveyed.
[0008] Preferably, a transfer circuit board is arranged in the upper chamber of the cylinder, and a cover is arranged on the front of the chamber. A plurality of heat sinks are arranged at equal intervals on the upper side wall of the cylinder, and a heat preservation sleeve is sleeved on the lower part of the cylinder. A wire passing hole is arranged on the cover. At the same time, the semiconductor refrigeration sheet is electrically connected to the transfer circuit board, and a plurality of contacts are arranged on the other side of the transfer circuit board. The contacts penetrate the cylinder and contact the electrodes preset on the side wall of the electric heating cylinder. At the same time, the middle of the chamber is filled with silicone rubber.
[0009] Preferably, a front plate with a "J" - shaped top - view contour is riveted on the front of the bottom plate, and guide rods are arranged vertically and horizontally between the front plate and the bottom plate. The arrangement of the guide rods realizes the limit in the front, left - right directions during the conveying of the printing material, ensuring that the printing material can be smoothly clamped by the feeding wheel.
[0010] Preferably, the side wall of the rotating seat is fixedly connected with a lower material guiding mechanism, and the lower material guiding mechanism is located directly above the feeding mechanism, the lower material guiding mechanism comprises a square box, a first guide ring is rotatably connected in the square box, and the front end of the first guide ring extends out of the square box, two U-shaped elastic members are arranged in the square box, and the first guide ring is located between the two U-shaped elastic members, and a front stopper is fixedly connected to the front end of the square box. The printing material passes through the first guide ring, ensuring that the printing material can only enter from directly above the feeding mechanism, and the two U-shaped elastic members ensure that the first guide ring can rotate left and right, avoiding excessive stress on the printing material.
[0011] Preferably, the side wall of the rotating seat is fixedly connected with a lower material guiding mechanism, and the lower material guiding mechanism is located directly above the feeding mechanism, the lower material guiding mechanism comprises a square box, a first guide ring is rotatably connected in the square box, and the front end of the first guide ring extends out of the square box, two U-shaped elastic members are arranged in the square box, and the first guide ring is located between the two U-shaped elastic members, and a front stopper is fixedly connected to the front end of thesquare box. The printing material passes through the first guide ring, ensuring that the printing material can onlyenter from directly above the feeding mechanism, and the two U-shaped elastic members ensure that the first guidering can rotate left and right, avoiding excessive stress on the printing material.
[0012] Preferably, the inside of the fixed seat is fixedly connected with a first motor, the output end of the first motor is fixedly connected with a shaft coupling, the lower part of the shaft coupling is a spline, the upper end of the rotating seat is fixedly connected with a first cover plate, the middle part of the first cover plate is provided with a matching hole, and the spline is matched with the matching hole. Starting the first motor drives the rotating seat to rotate, realizing the switching of the print head.
[0013] Preferably, the shaft coupling is fixedly connected with a slip ring. The use of the slip ring ensures power supply and communication below.
[0014] Preferably, the upper part of the rotating seat is sleeved with two plane bearings, a connecting ring is arranged between the two plane bearings, the lower part of the fixed seat is sleeved on the outside of the connecting ring, and the lower part of the fixed seat is inserted with a screw, and the screw is threadedly matched with the connecting ring. In assembly, the edge of the first cover plate is buckled above the plane bearing, the connecting ring is between the two plane bearings, and the connecting ring is fixedly connected with the fixed seat, so that the rotation between the fixed seat and the rotating seat is stable.
[0015] Preferably, the upper end of the rotating seat and the fixed seat is provided with an electrical chamber, and the upper end of the fixed seat is fixedly connected with a second cover plate. The electrical chamber is used for accommodating the control module.
[0016] The beneficial effects of the present application are as follows:
[0017] 1. Multiple print heads are arranged, each print head is equipped with different printing materials, different printing materials can be used at different positions according to the application requirements of the workpiece, and the cost of printing materials and the cost of subsequent reprocessing are reduced as a whole.
[0018] 2, The electric heating cylinder is internally provided with a movable column, the inside of the movable column is a taper hole with a small upper part and a large lower part, when the print head needs to be switched, the coil at the movable column is powered off, at the same time, the semiconductor refrigeration sheet is powered on, the refrigeration side faces the movable column, at this time, the printing material in the movable column is solidified, then the feeding mechanism is actuated to pull up the printing material, at this time, the movable column moves upward and generates negative pressure below, at this time, the material at the nozzle is sucked back into the inside of the cylinder, avoiding the problem of yarn drawing of the current nozzle in the switching process, affecting the printing quality.
[0019] 3, The feeding mechanism comprises a rotating wheel, an elastic ring and a feeding wheel, the printing material is clamped by the feeding wheel, at the same time, the elastic ring is deformed under force, the reaction force of which ensures the stability of clamping, at the same time, due to the arrangement of the elastic ring, printing materials with various diameters can be transported, at the same time, the elastic ring is tightly clamped to meet the demand of high-precision feeding and the lifting action required to solve the problem of yarn drawing. BRIEF DESCRIPTION OF DRAWINGS
[0020] Fig. 1 is a perspective view of the present application;
[0021] Fig. 2 is an exploded view of the main structure of the present application;
[0022] Fig. 3 is a structural view of the coupling part of the present application;
[0023] Fig. 4 is an enlarged view of A in Fig. 2;
[0024] Fig. 5 is a sectional view of the print head of the present application;
[0025] Fig. 6 is an exploded view of the print head of the present application;
[0026] Fig. 7 is a sectional view of the electric heating cylinder of the present application;
[0027] Fig. 8 is an exploded view of the feeding mechanism of the present application;
[0028] Fig. 9 is an exploded view of the lower material guiding mechanism of the present application;
[0029] Fig. 10 is an exploded view of the upper material guiding mechanism of the present application.
[0030] List of reference signs: 1, print head; 2, feeding mechanism; 3, lower material guiding mechanism; 4, rotating seat; 5, fixed seat; 6, upper material guiding mechanism; 7, coupling; 8, first cover plate; 9, first motor; 10, second cover plate; 11, spline; 12, slip ring; 13, plane bearing; 14, connecting ring; 101, nozzle; 102, heat preservation sleeve; 103, cylinder; 104, movable column; 105, cooling fin; 106, spring; 107, cover; 108, semiconductor refrigeration sheet; 109, adapter circuit board; 1010, electric heating cylinder; 1011, coil; 201, front plate; 202, guide rod; 203, rotating wheel; 204, elastic ring; 205, feeding wheel; 206, rotating shaft; 207, bottom plate; 208, second motor; 301, first guide ring; 302, front stopper; 303, square box; 304, U-shaped elastic member; 601, fixed sleeve; 602, second guide ring; 603, support ring; 604, threaded sleeve. DETAILED DESCRIPTION
[0031] The present application will be further clarified by the following examples, which should be considered as merely illustrative and not limiting the scope of the application. It should be noted that the terms "front", "rear", "left", "right", "upper" and "lower" as used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions towards or away from the geometric center of a particular component.
[0032] As shown in FIGS. 1-10, a printing mechanism with multiple hot-melt nozzles includes a fixed seat 5, the lower part of which is a cylindrical pipe, the upper end of which is a rectangular plate with rounded corners, and the four corners of the rectangular plate are provided with mounting holes, the lower end of the fixed seat 5 is rotatably connected with a rotating seat 4, which is also cylindrical, and the lower end edge of the rotating seat 4 is fixedly connected with a plurality of print heads 1 at equal angles, the multiple print heads 1 can realize that a single printing mechanism can print multiple materials, and at the same time, on a single workpiece, different parts can realize the demand for different printing materials, and above each print head 1 is provided with a feeding mechanism 2 for feeding the printing material into the print head 1.
[0033] The printing head 1 comprises a cylinder 103, the upper end of the cylinder 103 is a connecting plate piece, the connecting plate piece is provided with a mounting hole, which is beneficial to be fixedly connected with the lower end of the rotating seat 4, the inside of the cylinder 103 is vertically provided with an electric heating cylinder 1010, the electric heating cylinder 1010 is sleeved in the inside of the cylinder 103, which is beneficial to be disassembled, the side wall of the electric heating cylinder 1010 is wound with a plurality of coils 1011, it is noted that each coil is independently controlled, which is used for realizing that different temperatures are set at different heights of the cylinder 103, the lower end of the cylinder 103 is fixedly connected with a nozzle 101, the nozzle 101 is used for sending out the melted printing material, the upper end of the cylinder 103 is provided with a feeding hole, and the feeding hole is located above the preset through hole of the nozzle 101, the printing material enters the inside of the cylinder 103 from the feeding hole, and the upper end edge of the feeding hole is provided with a fillet, in addition, the printing material is pushed into the inside of the cylinder 103 by the feeding mechanism 2.
[0034] The inside of the electric heating cylinder 1010 is provided with a movable column 104, the movable column 104 is located in the middle of the electric heating cylinder 1010, the middle of the movable column 104 is provided with a taper hole with a small upper end and a large lower end, the upper end of the movable column 104 is fixedly connected with a spring 106, and the upper end of the spring 106 abuts against the upper part of the cylinder 103, under the suspension of the spring 106, the position of the movable column 104 is kept, and the pressure change of the printing material during melting can also be balanced, the upper part of the cylinder 103 is provided with a chamber, and the chamber is provided with a semiconductor refrigeration sheet 108, one side of the semiconductor refrigeration sheet 108 for refrigeration faces the movable column 104, and the movable column 104 is cooled and solidified when the semiconductor refrigeration sheet 108 is electrified.
[0035] Further, when the printing head 1 is switched, the coil 1011 at the movable column 104 is deenergized, then the semiconductor refrigeration sheet 108 is electrified, the printing material at the movable column 104 is cooled and solidified, at this time, the feeding mechanism 2 lifts the printing material, the solidified printing material also lifts the movable column 104 under the structure of the taper hole, so that negative pressure is generated below, the material at the nozzle 101 is sucked back, the problem of filament of the printing material is reduced, and the quality of the printed part is reduced.
[0036] The feeding mechanism 2 includes a bottom plate 207, which is fixedly connected to the rotating base 4 by screws and bolts. Two parallel rotating shafts 206 are arranged on the bottom plate 207. Rotating wheels 203 are arranged on the rotating shafts 206. Grooves are provided on the side walls of the rotating wheels 203, and elastic rings 204 and feeding wheels 205 are snap-fitted in the grooves from the inside to the outside. The printing material passes through between the feeding wheels 205. Further, arc-shaped grooves are provided on the side walls of the feeding wheels 205, and convex stripes are provided in the arc-shaped grooves to play an anti-slip role and ensure that the printing material is held tightly. After the printing material passes through the two feeding wheels 205, the acting force generated by the deformation of the elastic ring 204 ensures the stable clamping of the feeding wheels 205. The setting of the elastic ring 204 enables the transportation of printing materials with various different diameters. The back of the bottom plate 207 is fixedly connected with a second motor 208, and the output end of the second motor 208 is fixedly connected to one of the rotating shafts 206. Starting the second motor 208 drives the feeding wheels 205 to rotate, realizing the transportation of materials. Due to the tight clamping, the transportation volume can be determined and the printing speed can be set.
[0037] A transfer circuit board 109 is arranged in the upper chamber of the cylinder 103. A plurality of contacts are arranged on the back of the transfer circuit board 109. At the same time, electrodes are arranged on the upper side wall of the electric heating cylinder 1010, and the electrodes are electrically connected to the coil 1011. When the electric heating cylinder 1010 is assembled inside the cylinder 103, the contacts and the electrodes are in corresponding contact to supply power to the coil. At the same time, the semiconductor refrigeration sheet 108 is also electrically connected to the transfer circuit board 109. The refrigerating side of the semiconductor refrigeration sheet 108 is attached to the transfer circuit board 109, and a cover 107 is arranged on the front of the chamber. The cover 107 seals the chamber, and silicone rubber is filled inside the chamber to block the gaps therein. A plurality of heat dissipation fins 105 are equidistantly arranged on the upper side wall of the cylinder 103. The setting of the heat dissipation fins 105 improves the heat dissipation capacity of the upper part of the cylinder 103. A heat preservation sleeve 102 is sleeved on the lower part of the cylinder 103. The use of the heat preservation sleeve 102 reduces the heat dissipation speed of the cylinder 103.
[0038] A front plate 201 with a "ji" - shaped top view contour is riveted on the front of the bottom plate 207. Both the bottom plate 207 and the wall plate 201 are sheet metal parts with a small thickness. The riveting method is more conducive to the connection between the two. Guide rods 202 are arranged vertically and horizontally between the front plate 201 and the bottom plate 207. Specifically, three guide rods 202 are arranged. Two of them are located on the upper sides on both sides of the feeding wheels 205, and the other one is located at the upper front end of the feeding wheels 205, realizing the front and left - right guiding of the printing material.
[0039] The side wall of the rotating seat 4 is fixedly connected with a lower material guiding mechanism 3, and the lower material guiding mechanism 3 is located directly above the feeding mechanism 2, the lower material guiding mechanism 3 comprises a square box 303, the inside of the square box 303 is rotatably connected with a first guide ring 301, and the front end of the first guide ring 301 extends out of the square box 303, the front end of the first guide ring 301 is a circular ring, the printing material passes through the circular ring, the inside of the square box 303 is provided with two U-shaped elastic members 304, and the first guide ring 301 is located between the two U-shaped elastic members 304, that is, under the action of the two U-shaped elastic members 304, the first guide ring 301 is centrally arranged, and under the limitation of the U-shaped elastic member, the first guide ring 301 can swing left and right, the front end of the square box 303 is fixedly connected with a front stop member 302, the front stop member 302 blocks the square box 303, and a convex rod is arranged on the front stop member 302 and extends into the inside of the square box 303, and a fixed pin is further arranged and vertically penetrates the convex rod and the square box 303.
[0040] The side wall of the fixed seat 5 is fixedly connected with an upper material guiding mechanism 6, the upper material guiding mechanism 6 comprises a fixed sleeve 601, one side of the fixed sleeve 601 is L-shaped in cross section, is used for receiving the structure above, and a plurality of screws are penetratingly arranged on the fixed sleeve 601 to fixedly connect the fixed sleeve 601 to the fixed seat 5, the fixed sleeve 601 is sleeved with a supporting ring 603, a plurality of second guide rings 602 are fixedly connected to the supporting ring 603 at equal angles, the second guide rings 602 are the same as the first guide ring 301 in structure, a threaded sleeve 604 is threadedly connected to the upper portion of the fixed sleeve 601, and the threaded sleeve 604 limits the supporting ring 603 upward and downward, according to the use scene, the threaded sleeve 604 can be loosened to switch the supporting ring 603 between rotation and fixation.
[0041] Due to the arrangement of the fixed seat 5 and the rotating seat 4, the upper material guiding mechanism 6 and the lower material guiding mechanism 3 are arranged, and the use requirement of the printing mechanism is met.
[0042] The inside of the fixed seat 5 is fixedly connected with a first motor 9, the first motor 9 is fixedly connected to a pre-set partition plate in the inside of the fixed seat 5 through a screw, the output end of the first motor 9 is fixedly connected with a shaft coupling 7, the lower portion of the shaft coupling 7 is a spline 11, the upper end of the rotating seat 4 is fixedly connected with a first cover plate 8, the middle portion of the first cover plate 8 is provided with a matching hole, and the matching hole is matched with the spline 11, that is, the first cover plate 8 is matched in a plug-in manner through the spline 11, the first motor 9 is started to drive the rotating seat 4 to rotate.
[0043] The shaft coupling 7 is fixedly connected with a slip ring 12. The slip ring 12 provides power supply and communication below, the shaft coupling 7 is hollow, the line on one side of the slip ring 12 passes through the shaft coupling 7 and enters the rotating seat 4 below, and a wire groove is arranged on the inner wall of the fixed seat 5, and the cable passes through the wire groove and is electrically connected with the shaft coupling 7.
[0044] The upper part of the rotating seat 4 is sleeved with two plane bearings 13, and a connecting ring 14 is arranged between the two plane bearings 13, that is, the connecting ring 14 is arbitrarily rotated between the two plane bearings 13, the lower part of the fixed seat 5 is sleeved on the outer side of the connecting ring 14, and the lower part of the fixed seat 5 is inserted with a screw, the screw is in threaded connection with the connecting ring 14, further, when the first cover plate 8 is fixed, the edge thereof is buckled on the plane bearing 13 to limit the up-down position, and after the connecting ring 14 and the fixed seat 5 are fixedly connected, there is no up-down movement gap between the rotating seat 4 and the fixed seat 5.
[0045] The upper ends of the rotating seat 4 and the fixed seat 5 are both provided with electrical chambers, and the electrical chambers are provided with power supply circuits and driving motors, for example, the electrical chamber on the fixed seat 5 is provided with a communication node for communication with an upper computer and a control circuit of the first motor 9, and the rotating seat 4 is provided with a control circuit of a second motor 208, a semiconductor refrigeration sheet 108 and a coil 1011, the upper end of the fixed seat 5 is fixedly connected with a second cover plate 10, the second cover plate 10 seals the electrical chamber, and the edge of the second cover plate 10 is provided with a connecting structure, and the side wall of the fixed seat 5 is provided with a screw and is in threaded connection with the connecting structure.
[0046] The technical means disclosed in the scheme of the application is not only limited to the technical means disclosed in the above-mentioned embodiments, but also includes the technical scheme composed of any combination of the above technical features.
Claims
1. A printing mechanism with multiple hot melt nozzles, characterized in that, It includes a fixed seat (5), the lower end of the fixed seat (5) is rotatably connected to a rotating seat (4), the lower end edge of the rotating seat (4) is fixedly connected with a plurality of printing heads (1) at equal angles, and a feeding mechanism (2) is arranged directly above each printing head (1); The printing head (1) includes a cylinder (103), an electric heating cylinder (1010) is vertically arranged inside the cylinder (103), a plurality of coils (1011) are wound around the side wall of the electric heating cylinder (1010), a nozzle (101) is fixedly connected to the lower end of the cylinder (103), a feeding hole is arranged at the upper end of the cylinder (103), and the feeding hole is directly above a preset through hole on the nozzle (101); An active column (104) is arranged inside the electric heating cylinder (1010), and a tapered hole with a smaller upper part and a larger lower part is arranged in the middle of the active column (104), a spring (106) is fixedly connected to the upper end of the active column (104), and the upper end of the spring (106) abuts against the upper part of the cylinder (103), a chamber is arranged on the upper side wall of the cylinder (103), and a semiconductor refrigeration sheet (108) is arranged in the chamber; The feeding mechanism (2) includes a bottom plate (207), two parallel rotating shafts (206) are arranged on the bottom plate (207), rotating wheels (203) are arranged on the rotating shafts (206), grooves are arranged on the side walls of the rotating wheels (203), and an elastic ring (204) and a feeding wheel (205) are snap-fitted in the grooves from the inside to the outside, a second motor (208) is fixedly connected to the back of the bottom plate (207), and the output end of the second motor (208) is fixedly connected to one of the rotating shafts (206).
2. The printing mechanism with multiple hot melt nozzles according to claim 1, characterized in that: A transfer circuit board (109) is arranged in the upper chamber of the cylinder (103), a cover (107) is arranged on the front of the chamber, a plurality of heat sinks (105) are arranged at equal distances on the upper side wall of the cylinder (103), and a heat preservation sleeve (102) is sleeved on the lower part of the cylinder (103).
3. The printing mechanism with multiple hot melt nozzles according to claim 1, characterized in that: A front plate (201) with a "Ji" - shaped top view contour is riveted on the front of the bottom plate (207), and guide rods (202) are arranged vertically and horizontally between the front plate (201) and the bottom plate (207).
4. The printing mechanism with multiple hot melt nozzles according to claim 1, characterized in that: A lower material guiding mechanism (3) is fixedly connected to the side wall of the rotating seat (4), and the lower material guiding mechanism (3) is directly above the corresponding feeding mechanism (2). The lower material guiding mechanism (3) includes a square box (303), a first guiding ring (301) is rotatably connected inside the square box (303), and the front end of the first guiding ring (301) extends out of the square box (303). Two U - shaped elastic parts (304) are arranged inside the square box (303), and the first guiding ring (301) is located between the two U - shaped elastic parts (304). A front blocking part (302) is fixedly connected to the front end of the square box (https: / / patents.google.com / patent / CN113413743A / en).
5. The printing mechanism with multiple hot melt nozzles according to claim 1, characterized in that: The side wall of the fixed base (5) is fixedly connected to an upper guide mechanism (6). The upper guide mechanism (6) includes a fixed sleeve (601). A support ring (603) is sleeved on the fixed sleeve (601). Several second guide rings (602) are fixedly connected at equal angles on the support ring (603). A threaded sleeve (604) is threadedly connected to the upper part of the fixed sleeve (601).
6. The printing mechanism with multiple hot melt nozzles according to claim 1, characterized in that: The fixed base (5) is internally fixedly connected to a first motor (9), and the output end of the first motor (9) is fixedly connected to a coupling (7). The lower part of the coupling (7) is a spline (11). The upper end of the rotating base (4) is fixedly connected to a first cover plate (8). The middle part of the first cover plate (8) is provided with a mating hole and mates with the spline (11).
7. The printing mechanism with multiple hot melt nozzles according to claim 6, characterized in that: A slip ring (12) is fixedly connected to the coupling (7).
8. The printing mechanism with multiple hot melt nozzles according to claim 1, characterized in that: The upper part of the rotating seat (4) is fitted with two plane bearings (13), and a connecting ring (14) is provided between the two plane bearings (13). The lower part of the fixed seat (5) is fitted on the outside of the connecting ring (14), and a screw is inserted into the lower part of the fixed seat (5). The screw and the connecting ring (14) are threaded together.
9. A printing mechanism with multiple hot melt nozzles according to claim 1, characterized in that: Both the rotating seat (4) and the fixed seat (5) are provided with electrical chambers at their upper ends, and the upper end of the fixed seat (5) is fixedly connected with a second cover plate (10).